Hallo, guys/galz this small nipple with a breather pipe behind the cylinder is leaking alot of oil. My bike was full according to my glass window monitor. I drove about 40 km and when i returned the glass window displayed the oil level on the quarter mark. I could not see any oil leakage from the casing, but the breather pipe was dripping. I checked the forum for any data and got the crank seals as a result. Is this the only thing that cause this or are there any surface problems that my also be a cause.